[冷枫]AJAX编写的用户注册实例及技术小结

1/**//*

2 * Created on 2005-12-31

3 *

4 * TODO To change the template for this generated file go to

5 * Window - Preferences - Java - Code Style - Code Templates

6 */

7package com.event;

8

9import javax.servlet.ServletException;

10import javax.servlet.http.HttpServletRequest;

11import javax.servlet.http.HttpServletResponse;

12

13import com.beans.EBaseInfo;

14

15/** *//**

16 * @author Alpha 2007-7-5

17 *

18 * ＜P＞Ajax 演示---企业注册时检查企业用户名和企业名称＜/P＞

19 *

20 * TODO To change the template for this generated type comment go to

21 * Window - Preferences - Java - Code Style - Code Templates

22 */

23public class CheckUserAndComNm {

24 private String msgStr = "";

25 protected void doGet(HttpServletRequest request,HttpServletResponse response)

26 throws ServletException

27 {

28

29 　EComBaseInfo info=new EComBaseInfo();

30 　String oprate=request.getParameter("oprate")).trim();

31 　String userName=request.getParameter("userName");

32 　String passWord=request.getParameter("password");

33 　String comName=request.getParameter("comName");

34

35 　try

36 　{

37 if(oprate.equals("chkUser"))

38 {

39 　response.setContentType("text/html;charset=GB2312");

40 　if(userName.length()＜5||userName.length()＞20)

41 　{

42 msgStr = "对不起,用户名必须为字母、数字或下划线，长度为5-20个字符!";

43 　}

44 　else

45 　{

46 boolean bTmp=info.findUser(userName); //找查数据库中有无该用户名

47 if(bTmp)

48 　msgStr ="对不起,此用户名已经存在,请更换用户名注册!";

49 else

50 　msgStr ="";

51 　}

52 　response.getWriter().write(msgStr);

53 }

54 else if(oprate.equals("chkCom"))

55 {

56 　response.setContentType("text/html;charset=GB2312");

57 　if(comName.length()＜6||comName.length()＞100)

58 　{

59 msgStr = "对不起,公司名称长度为6-100个字符(不包括字符内的空格)!";

60 　}

61 　else

62 　{

63 boolean bTmp=info.findCom(comName); //找查数据库中有无该企业名

64 if(bTmp)

65 　msgStr ="对不起,此企业名称已经存在,请更换企业名称注册!";

66 else

67 　msgStr ="";

68 　}

69 　response.getWriter().write(msgStr);

70

71 }

72 　}

73 　catch(Exception ex)

74 　{

75 　}

76 　finally

77 　{

78 request.setAttribute("url",url);

79 　}

80 }

81

82 protected void doPost(HttpServletRequest request,HttpServletResponse response)

83 throws ServletException

84 {

85 　doGet(request,response);

86 }

87}

88